Effects Of High Temperatures On Development And Fecundity Of Aulacorthum Solani (Homoptera: Aphididae) And Aphis Glycines (Homoptera: Aphididae)

Effects of high temperatures on development and fecundity were examined using Aulacorthum solani (Kaltenbach) and Aphis glycines Matsumura clones. Nymphs of all A. solani clones showed 100% mortality at 30 degrees C. By contrast, all nymphs of three A. glycines clones out of four survived and became adults at 30 degrees C. The numbers of nymphs produced by adult females of A. solani clones were higher at 20 degrees C than at 28 degrees C. Adult females of A. glycines clones produced more nymphs at 28 degrees C than at 20 degrees C. These results suggest,that A. solani is more susceptible to high temperatures rather than A. glycines.